19170139873 has 2 divisors, whose sum is σ = 19170139874. Its totient is φ = 19170139872.

The previous prime is 19170139741. The next prime is 19170139883. The reversal of 19170139873 is 37893107191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18580961344 + 589178529 = 136312^2 + 24273^2 .

It is a cyclic number.

It is not a de Polignac number, because 19170139873 - 2²¹ = 19168042721 is a prime.

It is a super-2 number, since 2×19170139873² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19170139883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9585069936 + 9585069937.

It is an arithmetic number, because the mean of its divisors is an integer number (9585069937).

Almost surely, 2^19170139873 is an apocalyptic number.

It is an amenable number.

19170139873 is a deficient number, since it is larger than the sum of its proper divisors (1).

19170139873 is an equidigital number, since it uses as much as digits as its factorization.

19170139873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 49.

The spelling of 19170139873 in words is "nineteen billion, one hundred seventy million, one hundred thirty-nine thousand, eight hundred seventy-three".